AS/NZS 2063 Bike helmets sold in Australia have been tested to the Standard AS/NZS2063. These are the helmets legally required for use on bike. Hard shell, usually lots of ventilation holes, polyurethane foam inner and padding   THE FIT you want the helmet to be comfortable on the head and not move forward/backwards or side to side.  These Three lines – Helmet should fit snugly ‘across the eyebrows’ ‘down the sides’ and ‘under the chin’.     ADJUSTING SYSTEM This allows the helmet to be tightened under the back of the head, at the occipital bone at the base…